We were also taught to use 230KIAS as a ballpark figure. Do NOT start pulling up until the tip of the speed vector touches 230, at which time you gently recover back to level flight. This method worked really well
While the above figures will get you out of immediate trouble, and depending on what weather conditions, if any, caused the high altitude stall problem in the first place, continue accelerating in the descent to severe turbulence speed before levelling out, will provide high/low speed margins in severe turbulent air.